Valve diaphragm



FIG. 1 is a top plan view of a valve diaphragm incorporating the design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a side view thereof; and,

FIG. 4 is a cross-sectional view as taken from line 4—4 of FIG. 1. 

The ornamental design for a valve diaphragm, substantially as shown. 